I was wondering if anyone had ever had this problem before. I'm driving along and all the sudden, black smoke (oil) comes pouring out of the back of my car. (I could loose cops in it!) It only does it at certain times randomly. It doesn't matter if I speed up, turn to a certain direction ect. It just does it when it feels like it. I replaced my valve cover gaskets thinking this would get rid of the problem but its still there. It comes from the back of the engine compartment towards the driver's side. The only thing I can figure is I have a bad rear seal but before I try and replace it, I was wondering if anyone else has had this problem and knows for sure what the cause is. Thanks in advance, Duke